The British Government has ruled out a call from the former South African President, Nelson Mandela, for the Libyan man convicted of the Lockerbie bombing to be transferred from a Scottish prison to one in a Muslim country.

Megrahi is "all alone" in Barlinnie

Mr Mandela was speaking after a visit to Abdelbaset Ali Mohmed al-Megrahi, who is serving a life sentence at Barlinnie Prison in Glasgow.

A spokesman for UK Prime Minister Tony Blair said the nature of Mr Megrahi's detention had been agreed with the Libyan Government, and no meeting with Mr Mandela was planned.

Mr Mandela, who played a key role in persuading Libya to hand over Megrahi for trial, has also called for a fresh appeal in his case.

Mr Mandela had earlier told a packed media conference he would be seeking talks with Mr Blair and US President George W Bush about the case.

'All alone'

Mr Mandela said the Libyan had been detained in specially segregated quarters in virtual isolation and had been harassed by other prisoners.

Megrahi's family arrives at the jail

He told reporters: "Megrahi is all alone. He has nobody he can talk to. It is a psychological persecution that a man must stay for the length of his long sentence all alone."

Mr Mandela said it would make it easier for his family to visit him if he was in a place like Morocco, Tunisia or Egypt.

"He says he is being treated well by the officials, but when he takes exercise he has been harassed by a number of prisoners," said Mr Mandela.

"He cannot identify them because they shout at him from their cells through the windows and sometimes it is difficult even for the officials to know from which quarter the shouting occurs."

Privy Council

During the media conference, Mr Mandela said doubts existed over Megrahi's trial and subsequent failed appeal at a special Scottish court in the Netherlands.

He said a four-judge commission from the Organisation of African Unity had criticised the process.

Megrahi was jailed for life for the bombing of Pan Am Flight 103 which exploded over Lockerbie in Scotland on 21 December, 1988 with the loss of 270 lives. A second Libyan was acquitted at the trial.

"They have criticised it fiercely, and it will be a pity if no court reviews the case itself," said Mr Mandela.

"From the point of view of fundamental principles of natural law, it would be fair if he is given a chance to appeal either to the UK Privy Council or the European Court of Human Rights," he added.

Megrahi's family also visited the Libyan on Monday, arriving shortly after Mr Mandela.